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Published on: October 27, 2023
Bone and Furcation Changes in Molars After Comprehensive Orthodontics
Jennifer Yun-Chen Lee1, Shih-Jaw Tsai2, Hung-Jen Wei3
1School of Dentistry, College of Medicine, National Taiwan University and Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan.
International Dental Journal
|August 13, 2026
Summary
Comprehensive orthodontic treatment can impact periodontal health in adults with periodontitis. Careful planning is crucial to prevent molar bone loss, furcation involvement, and tooth loss, even with regular maintenance.
Area of Science:
- Periodontology
- Orthodontics
- Dental Implantology
Background:
- Assesses the impact of full-mouth fixed orthodontic treatment on molars in periodontitis patients.
- Evaluates periodontal bone levels, furcation involvement, and tooth loss post-treatment.
- Focuses on adults who received non-surgical periodontal therapy and maintenance.
Purpose of the Study:
- To evaluate the effects of orthodontic treatment on periodontal status of molars.
- To identify risk factors for periodontal deterioration and tooth loss during orthodontic therapy.
- To provide insights into preserving periodontal health during comprehensive orthodontic care.
Main Methods:
- Assessed molar periodontal status at pretreatment (T0) and posttreatment (T1), with survival at follow-up (T2).
- Analyzed baseline bone level, furcation, surgical history, craniofacial/dentoalveolar parameters, cephalometric changes, occlusion, and 3D molar movement.
- Used univariable and logistic regression analyses to find predictors of deterioration and tooth loss.
Main Results:
- Periodontal deterioration (bone loss, furcation involvement) occurred in 5.3% and 5.1% of molars, respectively.
- Deterioration linked to baseline support, prior surgery, molar extrusion, antagonist intrusion, and axial uprighting.
- Craniofacial and dentoalveolar factors also influenced risk; 1.7% of molars were lost post-treatment.
Conclusions:
- Compromised molars remain vulnerable to orthodontic deterioration despite maintenance, influenced by occlusal stress and craniofacial factors.
- Meticulous orthodontic management and biomechanical planning are essential for preserving function and periodontal health.
- Monitoring occlusal loading is vital to mitigate risks during comprehensive orthodontic treatment.
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